Rebuilding will take least, < 1 day, depending on the data and activeness of the server, the higher usage of the server, the lower rebuild rate.

Answer to 1)

The RAID system did it's own formatting in the background, it is invisible to the user. The reason i requested for you to format the replacement hard drive is to make sure it's clean without any configurations, as it will be easier to configure when it is blank. So the answer to your question is No, you need not format the drives.

Answer to 2)

I think I may have answered it on 1). If a hard drive is "virgin", technically, Yes, you can just replace it and it will rebuild once hotspare is set. You may research or check more about "Foreign" configuration on PERC.

Good to hear that you need not rebuild the server.

Also to answer the above thread you posted:

1. Do hard drives need to be formatted? and what is the file system to be formatted? Is is NTFS?

It will be formatted by the RAID system, need not to format it after RAID1 is created in Ctrl-R.

2. Once I get into RAID bios of the PowerEdge T110 II, what should I do next?

Delete the old VD, create a new RAID1. Hot spare will need to be assign after that.

3. After RAID1 created, and windows and OMSA is installed. What should I do next?

Nothing apparently. Make sure OMSA has no error logs, drivers are up to date, server is ready to go!

4. Is there any further or additional steps? Please advice. I really appreciat your help.

2. Originally, there were 2 physical drives and I created RAID 1 , so after the raid created, only 1 Virtual drive appeared in the OMSA.

the picture below I edited to show what it looked like before the failure. the status was green and the state was either online or ready. I can't remember exactly. Sorry bout that.

3. I noticed there was only 1 virtual disk which was stated under the "Layout" column in the virtual disks table in the OMSA as "RAID-1" (please see picture)

After I took off the failed harddrive and put in the replacement, there were another virtual disks appear and was stated as Non-RAID under the layout column in the VD table in the OMSA. exactly like this.

This pic is the current details of my server.

Or if you would like me to do any steps over again I would like to follow.

Rebuilding will take least, < 1 day, depending on the data and activeness of the server, the higher usage of the server, the lower rebuild rate.

Answer to 1)

The RAID system did it's own formatting in the background, it is invisible to the user. The reason i requested for you to format the replacement hard drive is to make sure it's clean without any configurations, as it will be easier to configure when it is blank. So the answer to your question is No, you need not format the drives.

Answer to 2)

I think I may have answered it on 1). If a hard drive is "virgin", technically, Yes, you can just replace it and it will rebuild once hotspare is set. You may research or check more about "Foreign" configuration on PERC.

Good to hear that you need not rebuild the server.

Also to answer the above thread you posted:

1. Do hard drives need to be formatted? and what is the file system to be formatted? Is is NTFS?

It will be formatted by the RAID system, need not to format it after RAID1 is created in Ctrl-R.

2. Once I get into RAID bios of the PowerEdge T110 II, what should I do next?

Delete the old VD, create a new RAID1. Hot spare will need to be assign after that.

3. After RAID1 created, and windows and OMSA is installed. What should I do next?

Nothing apparently. Make sure OMSA has no error logs, drivers are up to date, server is ready to go!

4. Is there any further or additional steps? Please advice. I really appreciat your help.